Finding the Fourth Proportional to 139,692.25, 192,769.58 and 79,261.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,692.25 : 192,769.58 = 79,261.59 : x
2. Step 2: Convert to fraction form
   139,692.25/192,769.58 = 79,261.59/x
3. Step 3: Cross multiply
   139,692.25x = 192,769.58 × 79,261.59
4. Step 4: Simplify right side
   139,692.25x = 15,279,223,018.12
5. Step 5: Solve for x
   x = 15,279,223,018.12/139,692.25
6. Step 6: Final answer
   x = 109,377.75